I found one, NIB on EBAY for $49.95 + tax, w/free shipping. The seller had a good reputation. After making sure it wasn't a generic brand, and it was indeed, a CleanZone, and making sure it was brand-new / unused, I bought it.
It arrived today (two days early). The factory box had been opened for inspection / display purposes only. The machine and it's accessories were still all factory sealed. I read thru the instructions and they were well written and easily understood.
The only thing it didn't come with, was a 5 volt / 1 amp USB charger. Luckily, my wife had one for a computer tablet she no longer uses. It did come with a charging cord though.
After about 1 hr. of charging up the unit, the green light came on indicating it was ready for use. It came with it's own carry case, as well as a large plastic zip-lock bag that everything goes into.
I hand cleaned my CPAP hose and face mask swivel today. I hooked the hose up to the machine, stuck it into the bag along with the swivel and face mask assembly. I pushed on the on/off button and it lit up blue as it was supposed to. The unit will beep and turn off automatically after 30 minutes. After it shuts off, you leave everything in the bag for an hour or so, before removing anything and using it.
All in all, I am pleased with it. Knowing my CPAP equip. is now cleaned AND sanitized, is peace-of-mind for me. The price of admission (cost) was minimal and not a huge investment.